# Observatório Astronômico Jiri Vlcek, Brazil: what it is and when to go

> Observatório Astronômico Jiri Vlcek is a planetarium in Brazil (Campos dos Goytacazes). Interests: With kids and Stargazing. The best time to visit is December to February and June to September. In December there are 13 h 19 of daylight, and in June, 10 h 41. Here is what it is, where it lies, when to come, how to get there and what else is nearby to turn it into a trip.

- Address: https://kokai.app/en/paises/america/brasil/observatorio-astronomico-jiri-vlcek/
- Reviewed on: 2026-10-08
- Language: en

## In a nutshell

- **What it is:** Planetarium · With kids, Stargazing
- **Where:** Brazil · Rua Doutor Siqueira 273, 28030130, Campos dos Goytacazes
- **Best time:** December to February and June to September.
- **Nearest airport:** GIG Rio De Janeiro, 229 km as the crow flies
- **Run by:** Clube de Astronomia Louis Cruls
- **Coordinates:** -21.76196, -41.33679

## What it is and where

Observatório Astronômico Jiri Vlcek is a planetarium in Brazil (Campos dos Goytacazes).

Its coordinates are -21.76196, -41.33679; the nearest main airport is Rio de Janeiro Galeão – Tom Jobim International Airport (GIG, Rio De Janeiro), 229 km as the crow flies. How to get around Brazil (train, car, bus) is covered in [its country guide](https://kokai.app/en/paises/america/brasil/#moverse).

- [Where it is](https://www.google.com/maps/search/?api=1&query=-21.761956%2C-41.336794)
- [Directions](https://www.google.com/maps/dir/?api=1&destination=-21.761956%2C-41.336794)

- **Run by:** Clube de Astronomia Louis Cruls

It is one of the [With kids](https://kokai.app/en/paises/america/brasil/familia/) and [Stargazing](https://kokai.app/en/paises/america/brasil/estrellas/) places in Brazil. In [Kokai](https://kokai.app/en/) it is already on your trip map next to the places you save yourself, and it goes into a day's plan with one tap.

## When to go

The best time to visit Observatório Astronômico Jiri Vlcek is **December to February and June to September**.

| Mes | Época | Hours of daylight |
| --- | --- | --- |
| January | Best time | 13 h 11 |
| February | Best time | 12 h 43 |
| March | Possible | 12 h 09 |
| April | Possible | 11 h 30 |
| May | Possible | 10 h 58 |
| June | Best time | 10 h 41 |
| July | Best time | 10 h 48 |
| August | Best time | 11 h 15 |
| September | Best time | 11 h 53 |
| October | Possible | 12 h 31 |
| November | Possible | 13 h 04 |
| December | Best time | 13 h 19 |

In December there are 13 h 19 of daylight, and in June, 10 h 41. Daylight hours are calculated from the site's latitude for the 15th of each month; when planning a full day on foot they matter as much as the weather.

| What you come for | Best time | Possible |
| --- | --- | --- |
| With kids | December to February and June to September | March to May and October to November |
| Stargazing | — | All year round |

It is not the same trip whatever you come for: Observatório Astronômico Jiri Vlcek has a different season depending on what you want to do here, and [Kokai](https://kokai.app/en/) puts it in the right month for you.

When to go to Brazil in general, with its festivals and peak seasons, is in [its country guide](https://kokai.app/en/paises/america/brasil/#cuando-ir).

## Before you go to Brazil

To enter Brazil there are 9 things to sort out before you leave, starting with “Passport valid for six months”: they are all, with their deadlines, in [the Brazil checklist](https://kokai.app/en/paises/america/brasil/#antes-de-salir). Currency: Brazilian real (BRL); plugs: Type N and C · 127 V and 220 V depending on the region · 60 Hz (you need an adapter and should check the voltage); emergencies: 190 police · 192 ambulance · 193 fire brigade.

In [Kokai](https://kokai.app/en/) you tick off the checklist inside your trip, and each item reminds you when it is time to do it.

## What is nearby

- [Igreja Principal do Imaculado Coração de Nossa Senhora do Rosário de Fátima](https://kokai.app/en/paises/america/brasil/igreja-principal-do-imaculado-coracao-de-nossa-senhora-do-ro/): Temples · 1.7 km
- [Ponte General Dutra](https://kokai.app/en/paises/america/brasil/ponte-general-dutra/): Bridge in Brazil · 2.2 km
- [Usina Cambahyba](https://kokai.app/en/paises/america/brasil/usina-cambahyba/): Ruins · 11 km
- [Atafona](https://kokai.app/en/paises/america/brasil/atafona/): Lighthouse in Brazil · 37 km
- [Pico São Mateus](https://kokai.app/en/paises/america/brasil/pico-sao-mateus/): Mountain in Brazil · 39 km

Distances are as the crow flies. Everything else is in [the Brazil guide](https://kokai.app/en/paises/america/brasil/).

## More in Brazil: With kids

- [Rio de Janeiro Botanical Garden](https://kokai.app/en/paises/america/brasil/rio-de-janeiro-botanical-garden/): park of the Botanical Garden, environmental preservation area of the Rio de Janeiro state in Brazil
- [Museu Paraense Emílio Goeldi](https://kokai.app/en/paises/america/brasil/parque-zoobotanico-do-museu-paraense-emilio-goeldi/): natural history museum, arboretum, zoological garden in Pará, Brazil
- [Beto Carrero World](https://kokai.app/en/paises/america/brasil/beto-carrero-world/): amusement park
- [Botanical Garden of São Paulo](https://kokai.app/en/paises/america/brasil/jardin-botanico-de-sao-paulo/): park of the Botanical Garden, environmental preservation area of the São Paulo state in Brazil
- [São Paulo Zoo](https://kokai.app/en/paises/america/brasil/jardin-zoologico-de-sao-paulo/): zoo in Brazil
- [Parque das Aves](https://kokai.app/en/paises/america/brasil/parque-das-aves/): privately owned zoo

Every Brazil place under With kids, each with its season, is on [its page](https://kokai.app/en/paises/america/brasil/familia/).

## Frequently asked questions

### What is Observatório Astronômico Jiri Vlcek?

It is a planetarium in Brazil.

### When is the best time to visit Observatório Astronômico Jiri Vlcek?

December to February and June to September. In December there are 13 h 19 of daylight, and in June, 10 h 41.

### How do you get to Observatório Astronômico Jiri Vlcek?

The nearest main airport is Rio de Janeiro Galeão – Tom Jobim International Airport (GIG), 229 km as the crow flies. From there, [directions](https://www.google.com/maps/dir/?api=1&destination=-21.761956%2C-41.336794) opens the route on the map, and how to get around Brazil is explained in [its country guide](https://kokai.app/en/paises/america/brasil/#moverse).

### How do I add it to my trip?

With one tap. In Kokai it is already on the Brazil map, next to the places you save yourself: add it to a day's plan, give it a time and, if you like, get a reminder when you pass nearby.

### What else is around here?

Nearby you have [Igreja Principal do Imaculado Coração de Nossa Senhora do Rosário de Fátima](https://kokai.app/en/paises/america/brasil/igreja-principal-do-imaculado-coracao-de-nossa-senhora-do-ro/), [Ponte General Dutra](https://kokai.app/en/paises/america/brasil/ponte-general-dutra/), [Usina Cambahyba](https://kokai.app/en/paises/america/brasil/usina-cambahyba/). The rest is in [the Brazil guide](https://kokai.app/en/paises/america/brasil/).

Data from [OpenStreetMap](https://www.openstreetmap.org/node/9662002455), licensed under the ODbL, and from [Wikidata](https://www.wikidata.org/), CC0. Daylight hours are calculated from the latitude. More in [credits](https://kokai.app/en/aviso/#creditos).